Jeremy Piven turned up to honor “The Social Network” screenwriter Aaron Sorkin at the Final Draft Awards Thursday night, but got distracted by a pretty cocktail waitress. At the bash at Beverly Hills’ Paley Center for Media, the “Entourage” star “suddenly became very interested in the tequila shots because the waitress was gorgeous.” He didn’t even mind that his car took an age to arrive for him to leave. A source said, “Jeremy has a Cadillac without an ignition key, and the girl sent to get it couldn’t figure out how to start it. It took about three people to get it started, but he didn’t even notice.”